Cheap low-effort AI-narrated training videos are exactly the problem alexb_ is referring to. WowTo seems like a good tool for that, so if YouTube spam isn't what you're intending, how would you control what people use it for?
Imagine you are a plumber that needs to onboard new people at your work and they need to know how to do a plumbing thing. Turn over is pretty high and teaching each and everyone of them yourself takes a lot of time - so you make a video.